How do you think our universe will end? With this worksheet, explore some of the common theories, and then come up with some of your own!

Where'd that shadow come from? Next time a scary shadow crosses your path, you'll know just what to look for.

Which comes first, genus or phylum? To complete this life science crossword, kids need to put the 9 levels of biological classification in the correct order.

The infamous Halley's Comet only comes around once every 75 years or so! Read some interesting info on the world's most famous comet.

Did you know that sound is actually caused by movement? Vibrations of particles create the sound that we hear.

Learn about the many different biomes the Earth is home to in this life science worksheet, which holds the answers to some simple life science questions.

Break down a word to create new ones with this fun worksheet for second through fifth graders!

Discover how water flows in this informative environmental science worksheet!